DE1653662A1 - Pump arrangement - Google Patents

Description

Dr. Ing. E. BERKENFELD, patent attorney, COLOGNE, Universitätsstrasse

Attachment file number

to enter the 1 ^. Füül ^l Uai '1 96' / Sch + Name d. Note γARWAY CORPORATION

Pump arrangement

The present invention relates to a rotary pump and more particularly relates to a piston pump having a rotating piston for feeding the pumping chamber a diaphragm pump with a pulsating pump liquid.

When operating diaphragm pumps, in which a pump fluid is repeatedly pressed into the pump chamber of the diaphragm pump and then sucked out again, the air trapped in the pump fluid often collects in the pump chamber and forms an air pocket here, which affects the performance of the diaphragm pump. Furthermore, with these pumps to change the flow rate of the diaphragm pump, either the entire pump arrangement has to be shut down in order to readjust the adjustment mechanism, or there are complicated adjustment mechanisms within the pump which impair the accuracy of the adjustment and which have many moving parts, see above that the efficiency of the pump is reduced because of the friction that occurs and regular service interruptions z] xv maintenance are required.

Based on this, the present invention is intended to be a create new pump assemblies that have better facilities for removing air or other gaseous fluids in order to prevent the formation of air or gas pockets within the pump chamber of the diaphragm pump.

The present invention is also intended to provide an improved

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Create pump arrangement of this type in which the stroke of the pump element can be adjusted very precisely without that the pump is stopped for this purpose.

The present invention is also intended to provide a new diaphragm pump assembly create, in which the pumping chamber of the diaphragm pump from a rotary pump pulsates with pumping liquid is applied; the rotary pump has a movable back and forth in a radial recess Piston, whereby this recess is arranged next to the pump chamber of the diaphragm pump, in order to avoid losses through longer

Reduce pump fluid lines. Specifically, W, the present invention provides an improved adjustment of this type, in which the adjustment is linear.

The present invention also provides a pump of the type described Type in which the rotor is arranged in a closed housing filled with pumping liquid, in the pesticide particles that may be contained in the pump liquid settle on the bottom of the housing and consequently do not interfere with rotor rotation while trapped air rises to the top of the housing, from where it can be drained to the outside.

The pump arrangement according to the invention is also intended to be proportionate be compact, a small overall length and a small distance between the 'bearings of the rotor shaft to have. Due to the type of construction of the pump according to the invention, it should be possible to move one on a circular path To arrange the piston and a membrane extremely close together, so that a stocky, compact component is created.

Further objects, features and advantages of the invention will become apparent from the following description of an exemplary embodiment, reference being made to the accompanying drawings will.

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Fig. 1 shows a side view of a pump arrangement according to the present invention.

Pig. 2 shows a plan view of FIG. 1.

Fig. 3 shows a partial front view of the pump arrangement .

FIG. 4 is a section along line 4-4 in FIG. 2.

FIGS. 5, 6 and 7 show sections along lines 5-5, 6-6 and 7-7 in FIG.

The '"' pump arrangement shown in the drawings has a housing 10 which at one end with an inlet 11 and an outlet 12 for a working fluid. At the other end of the housing 10 is a gear housing 14 provided, in which a rotor shaft 15 is mounted, which is connected to a drive motor I7 via a gear transmission 16 is. An adjusting wheel 18 is located on the front of the housing 10 intended.

In the interior of the housing 10, a partition wall 21 is arranged, which divides the housing into a diaphragm pump housing 22 and a rotor housing or a rotor chamber 2j5. Between two membrane plates 26 and 27, a membrane 25 is arranged in the membrane housing, which divides the membrane housing into a pump chamber and a working chamber 29. The inlet 11 is connected to the working chamber 29 via a one-way valve J1 and the outlet 12 is connected to the working chamber 29 via a one-way valve ^ 2. The valves J51 and J5 ² are designed in such a way that they only allow the working fluid to flow through the working chamber 29 from bottom to top when the diaphragm 25 is acted upon and deflected accordingly.

Pump liquid is used to act on and deflect the membrane 25 driven alternately into the pump chamber 28 and withdrawn therefrom. A rotor 41 is included for this purpose Rotor housing 2.3, for example by means of tapered roller bearings 42

109852/0283 BADORiGlNAC

and 43 on the inner rotor shaft part 44 and the outer one Rotor shaft part 15 supported. The rotor 41 has a radial recess 45 in which a piston 46 is displaceable is arranged. The piston 46 is moved by a spring 47 resting against the bottom 48 of the recess 45 turned outside. The lower end 48 of the recess 45 is standing via an opening 51 and a hollow transmission member 52 with the pumping chamber 28 in connection. Between the interior of the transmission link 52 and the center of the rotor recess 45 a central ventilation opening 53 is provided through which air can exit from the center of the recess 45.

An eccentric ring 55 is arranged around the rotor 41 and the protruding end of the piston 46 lies against this eccentric ring so that when the rotor 41 is rotated by the drive motor, a pumping action is achieved. To adjust the stroke height of the piston 46, the eccentric ring 55 is adjustably mounted in the housing 10; this points the eccentric ring 55 has an outer control ring 56 which is provided with outwardly projecting stub shafts 57 and 58; these stub shafts sit in bores 59 and 60 of the housing 10.

According to the illustration in Fig. 5, adjusting devices are provided, around the stub shafts 57 and 58 for changing the eccentricity of the control ring 56 with respect to the rotor 41 in their holes 59 and 60 to adjust. For this purpose, the stub shaft 58 is provided with a threaded hole 62, with which one end 63 of a set screw 64 is in threaded engagement. The shaft 65 of the adjusting screw 64 is at a standstill in threaded engagement with the housing and can be secured by means of a locking pin 66 which is connected to a locking or Clamping body 67 cooperates in the adjusting screw shaft 65. The pitch of the thread on the set screw end 63 is smaller than the pitch of the thread on the adjusting screw shaft 65, so that the axial movement of the adjusting screw 64 is greater than the amount of movement of the control ring 56; for example, causes the adjusting screw b4 to move axially of 2.54 cm a displacement of the expensive ring 56 of 1.27 cm;

109852/0283 bad original

In this way, the stroke adjustment of the piston 46 can be carried out very precisely by means of a type of micrometer scale. The adjusting wheel or the adjusting knob 18 is fastened to the adjusting screw 64 with a clamping screw 68 and has a scale 69 (see FIGS. 2 and 3) to indicate the position of the control ring in the rotor housing 23. For contraception a hydraulic locking of the stub shaft 57 in the recess 59 is a flattening on the stub shaft 57 71 proceed. Through which the in the Bore 59 enclosed pluidum can escape. The described adjusting device for the control ring 56 provides a linear relationship between the adjusting movement of the dial 18 and the setting of the stroke of the piston 46, so that a very precise linear regulation of the diaphragm pump throughput is possible. Within the There is very little play in the adjusting device and the diaphragm pump flow rate can be adjusted while the pump is running.

To reduce friction and the resulting wear is between the end of the piston 46 and the Eccentric ring 55 provided a roller bearing, in detail the invention provides that a bearing ring 73 is arranged on the inside of the eccentric ring 55, which on Hollen 74 is rotatably mounted inside the eccentric ring 55. The bearing ring 73 can therefore move with the rotor 41 Rotate in order to exclude friction between the piston 46 and the eccentric ring 55. The control ring 56 and the bearing ring 73 act with the rollers 74 like a roller bearing.

During operation, the rotor housing 23 is filled with pumped liquid, for example, up to the level designated A in FIGS. 4 and 5. When the rotor is rotated by the motor 17, the piston 46 is moved back and forth in the radial recess by the eccentricity of the eccentric ring 55 and by the spring 47. During the inward movement of the piston 46, pumping fluid is conveyed from the lower end of the recess 45 through the opening 51 and the channel 52 into the pumping chamber 2 ' , 30 that the membrane 25 to the outer

109852/0283 'BA »° ^ ^amM " -

Membrane plate 26 is dumped out%. Here the Working fluid in the working chamber 29 is forced through the valve 32 into the outlet 12. With further Rotation of the rotor 41 pushes the spring 47, the piston 46 outward, so that pumping liquid from the Chamber 28 through the channel 52 and the opening 5t into the lower part of the recess 45 is sucked. Through this Withdrawal of the pumping liquid from the chamber 28, the membrane 25 is bulged towards the membrane plate 27, so that Working fluid from inlet 11 through valve 31 in • the working chamber 29 is sucked.

Air or other gaseous media in the pump liquid that would normally collect behind the piston 46, can escape through the vent opening 53 into the channel and from there into the pump chamber 28. The gas bubbles in the pumping chamber 28 rise to the upper end of this chamber 28. According to the invention are devices for guiding the gaseous media collected in the pumping chamber are provided, thus through such air or gas pockets in the pump chamber 28, the pump performance is not impaired. For this purpose is in the partition wall 21 at the top A vertical channel 80 is provided at the end of the pumping chamber 28. The channel 80 runs upward through the partition wall 21 and is closed with a plug 83 at its upper end. A connecting channel 84 connects the channel with the rotor housing 23, this connecting channel 84 opening into the rotor housing near the upper end thereof.

During normal operation of the pump, the pump chamber 28 must be permanently closed so that no pumping liquid is discharged the pumping chamber 28 can exit; Such an exit of pump fluid from the pump chamber 28 would namely cease lead to a loss of performance of the pump. Therefore, the channel 80 is closed with a ventilation shaft 85 that the Channel 80 divided into an upper part 81 and a lower part 82. The vent shaft 85 has at its intersection with the vertical channel 80 pockets 86 on and there are devices provided to the wool 85 periodically

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to rotate and thereby the pockets 86 alternately at the lower end of the upper part 81 and at the upper end of the lower part 82 of the channel to be arranged. The one located at the upper end of the lower part 82 of the channel 80 Pocket 86 is filled with the fluid filling channel portion "82 during operation of the pump. When Have bubbles collected in the pump chamber 28, so they rise in the lower channel part 82 and get into the pocket 86 located there, whereby they displace the pump liquid possibly located in this pocket. If the shaft 85 is rotated, this will be shown below in the previous one lying pocket 86 located fluid pump liquid or gas bubbles - with the pocket 86 in the upper channel part 81 brought. At the same time, the pump liquid contained in the upper channel part 81 fills the liquid initially lying on top Pocket 86, so that the pocket located in this overhead Pump liquid reaches the lower channel part 82 as the shaft 85 rotates. Those in the upper canal part 81 conveyed gases collect at the upper end of the channel 80, and when the liquid level in the upper channel 81 sinks below the Verbildungskanal 84, so flows through this connecting channel 84 new pump fluid from the rotor chamber 23 into the upper channel part 81. On this In this way, new pumping liquid is constantly introduced into the upper channel part 81, which liquid from the lower channel part 82 Gaseous media and / or pump liquid brought into the upper channel part 81 are replaced.

The vent shaft 85 is opened by the rotation of the rotor 3 rotated step by step. For this purpose, at the inner end of the shaft there is a cranked shaft 91 over only one direction effective coupling 92 attached. At the free end of the cranked Shaft 91 is arranged a roller 93, which by a spring 94 is guided against a cam ring 95 which is arranged in a fixed connection with the rotor 41. In the exemplary embodiment shown, the cam ring has 95 only one protruding part which, for each revolution of the rotor, the sliding roller 93 and consequently the lever 91 once

109852/0283

swiveled back and forth by an angle of about 15, so that the shaft 85 is rotated via the one-way coupling 92 through a corresponding angle. While As the rotor 41 rotates, the shaft 85 rotates gradually. In the illustrated embodiment the shaft 85 completes a full revolution for every 24 revolutions of the rotor 41.

Suitable overpressure safeguards prevent the pump from being overloaded. For this purpose, a relief channel 75 is provided in the partition wall 21 which, in the exemplary embodiment shown, lies at the level of the lower end of the vertical channel 80. At the end of the relief channel 75 there is a pressure relief valve 76, the valve opening 77 of which is normally closed by a spring-loaded valve body 78. The contact pressure of the valve body 78 can be regulated by an adjusting screw 79 as shown in FIG. 6. The pressure relief valve J6 is screwed into the partition wall 21 so that it can be unscrewed for rapid venting of the pumping chamber, for example while the pump is being filled with pumping liquid.

If, for any reason, pumping liquid is lost from the pumping chamber 28, it is automatically refilled from the rotor chamber 23. For this purpose, a refill inlet 100 is provided in the bottom of the pump chamber 28, which is normally kept closed by a check valve 96. The check valve 96 has a valve body 97 which is normally guided by a spring 98 in the closed position. When the pressure in the pump chamber 28 drops so far that the pressure in the rotor chamber 23 exceeds the force of the spring 98, the valve body 97 lifts from its seat, so that pumped liquid flows through a channel 99 from the rotor chamber 23 into the pump chamber 28 can flow. By means of an actuating button 101 you can remove the pressure of the spring 98 on the valve body 97 to vu off non the valve, for example during the filling and emptying of the pump arrangement, so that the Pumpflüsaig speed quickly between the rotor chamber 23 and the Putsipkanuner

109852/0283 _{8AD 0R1G1NAL} "^{; i}

can flow. j

To drain the pumping liquid from the pump arrangement, a drain plug I03 is provided at the bottom of the rotor chamber 27> , which is unscrewed in order to let out the pumping liquid and any sludge that may have accumulated on the bottom of the rotor chamber 2J>. During the normal operating condition of the pump arrangement, the chamber 2 ^ is vented by loosening a vent plug 104 at the upper end of the chamber to allow expansion and contraction of the pumping liquid. The air flow during the expansion or contraction of the pump liquid passes through a ventilation opening 102 in the bottom of the gear housing 14. To transport the pump arrangement, the closure 104 is closed so that no pump fluid escapes. A quick fill plug 105 is provided on the top of the rotor chamber 25.

The drawings show a rotary pump with a single radial recess 45 and a single piston 46 in the rotor. It is obvious, however, that the rotor 41 can also be made longer to accommodate a plurality of pistons which work in the same or in opposite directions as desired. In the illustrated embodiment of the invention, an axial outlet line from the rotor recess 45 is also provided. At choice, however, can be the Pluidurn also in radial direction into a pressure chamber lead which communicates with the pump chamber, without thereby affecting the "stiffness" of the pump assembly adversely, which is achieved by the immediate juxtaposition of the rotor and the pumping chamber.

The description and the drawings relate to only one embodiment the invention. Of course, changes and modifications can be made within the scope of the following claims can be made on this embodiment.

Patent claims:

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Claims (10)

Dr. Ing. E. BERKENFELD, patent attorney, COLOGNE, Universitätsstrasse "Ί653662 Attachment file number to enter the name of the note YARWAY CORPORATION Claims M / pump arrangement, consisting of a diaphragm pump with a working chamber connected to a supply line and a discharge line via one-way valves and with 0t of a pumping chamber, which is used to initiate a pulsating Liquid connected to a piston pump with rotating piston is, characterized in that from the upper end of the pump chamber (28) for venting a channel (80) aus & t ,, the white intersecting this canal (85) is divided into an upper (81) and a lower part (82) that the shaft (85) pockets in the region of the channel (80) (86) which, when the shaft is rotated by 180 °, once with the upper part (81) and once with the lower part (82) of the channel (80) align that the upper part (82) of the channel means (84) for the introduction of Has pump liquid (23) and that devices (93, k 95) for incremental or continuous rotation of the shaft (85) are provided so that in the shaft pockets (86) on the one hand gases from the pump chamber (28) into the upper part (82) of the channel (80) and on the other hand pump liquid from the upper to the lower part of the channel and consequently into the Pump chamber is promoted. 2. Pump arrangement according to claim 1, characterized in that that the shaft (85) is provided for its rotation with a cam roller (93) which on one of the Ro- ' tation pump (45, 46) carried cam ring (95) such unrolls that the shaft (85) rotates during the rotation of the ^ rotary pump and thereby the two pockets alternately in connection with the upper and lower parts (81,82) of the channel (80). 109852/0283 3. Pump arrangement according to claim 1 or 2, characterized in that the channel (80) runs vertically and the shaft (85) is moved stepwise by its drive (93, 95). 4. Pump arrangement according to claim 3 *, characterized in that that the cam roller (93) has a coupling (92) with the shaft (85) that is effective in only one direction connected is. 5. Pump arrangement according to one of the preceding claims, characterized in that the housing (10) of the rotary pump (45, 46) is arranged directly next to the pump chamber (28) of the diaphragm pump and is filled with pumping liquid, that a with a substantially radial recess ( 45) provided and connected to a drive motor (17) rotor (41) is rotatably mounted in this housing that in.dieser radial recess (45) a piston (46) is mounted so that it can move back and forth around the rotor (41) The eccentric ring (55) is non-rotatably arranged, with which the protruding end of the piston (46) engages, that the inner end of the radial recess ^ 45) is connected to the pump chamber (28) of the diaphragm pump via a connecting channel (51> 52), and that the means for introducing pumping liquid into the upper part (81) of the channel (80) is a channel (84) which connects this upper part to the rotary pump housing (10). 6. Pump arrangement according to claim 5 *, characterized in that that on the inside of the eccentric ring (55) a slide ring (73) is preferably arranged on rollers (7 ^) with which the protruding end of the piston (46) is engaged. 7. Pump arrangement according to claim 6, characterized by an adjusting device (18, 56, 64) for changing the eccentricity of the eccentric ring to the axis of the rotor (41) from the outside of the housing when the rotary pump is running (45, 46) can be actuated and an adjusting screw (64) BAD ^ k 109852/0283 which with the housing (10) in · threaded engagement and also engages with the eccentric ring (55). 8th. . Pump arrangement according to claim 7 * characterized, that the adjusting screw (64) is also in thread engagement with the eccentric ring (55), the The pitches of the two adjusting screw threads (62, 65) are different. 9. Pump arrangement according to claim 7 or 8, characterized in that the adjusting device one around the eccentric ring (55) arranged with the control ring (56). has two stub shafts (57, 58) whose axis of rotation at right angles to the axis of rotation of the rotor (41), and that the adjusting screw (64) with one of the stub shafts (58) is engaged. 10. Pump arrangement according to one of the preceding claims, characterized in that the upper end of the Purap chamber (28) is separated from the housing (10) of the rotary pump (45, 46) by a partition (21) and that the ventilation duct (80) of the pump chamber (28) is arranged in this wall (21) and the control shaft (85) of the ventilation channel traverses the partition (21). 109852/0283